The model contains one compartment called "compartment". There are four species named S1, S2, S3 and S4 and two parameters named k1 and k2. Compartment "compartment" is 1-dimensional. The model contains two reactions defined as:

Reaction Rate
S1 + S2 → S3 + 2S4 k1 · S1 · S2 · compartment
S3 + S4 → S1 + S2 k2 · S3 · S4 · compartment

The initial conditions are as follows:

Value Units
Initial amount of S1 1.0 × 10−6 mole
Initial amount of S2 0.5 × 10−6 mole
Initial amount of S3 2.0 × 10−6 mole
Initial amount of S4 0 mole
Value of parameter k1 0.9 × 106 metre mole-1 second-1
Value of parameter k2 0.15 × 106 metre mole-1 second-1
Length of compartment "compartment" 1 metre

The species values are given as amounts of substance to make it easier to use the model in a discrete stochastic simulator, but (as per usual SBML principles) their symbols represent their values in concentration units where they appear in expressions.